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Unguided Media:
This is the wireless media that transport electromagnetic waves without using a physical
conductor. Signals are broadcast either through air. This is done through radio communication,
satellite communication and cellular telephony.
78. Explain point-to-point protocol
A communications protocol used to connect computers to remote networking services including
Internet service providers. 79. What are the two types of transmission technology available
(i) Broadcast and (ii) point-to-point 80. Difference between the communication and transmission.
Transmission is a physical movement of information and concern issues like bit polarity,
synchronization, clock etc. Communication means the meaning full exchange of information
between two communication media.